IEEE 802.3at PoE High-Power PD Interface with External Gate Driver - TPS2379


IEEE 802.3at PoE High-Power PD Interface with External Gate Driver



The TPS2379 device is an 8-pin integrated circuit that contains all of the features needed to implement an IEEE802.3at type-2 powered device (PD) such as Detection, Classification, Type 2 Hardware Classification, and 140-mA inrush current limit during startup. The low 0.5-Ω internal switch resistance, combined with the enhanced thermal dissipation of the PowerPAD package, enables this controller to continuously handle up to 0.85 A. The TPS2379 integrates a low 0.5-Ω internal switch to allow for up to 0.85 A of continuous current through the PD during normal operation. The TPS2379 device supports higher-power applications through an external pass transistor. The TPS2379 contains several protection features such as thermal shutdown, current limit foldback, and a robust 100-V internal switch.


  • IEEE 802.3at Type-2 Hardware Classification With
    Status Flag
  • Auxiliary Gate Driver for High-Power Expansion
  • Robust 100-V, 0.5-Ω Hotswap MOSFET
  • 1A (Typical) Operating Current Limit
  • 140 mA (Typical) Inrush Current Limit
  • DC-DC Converter Enable
  • 15 kV/8 kV System-level ESD Capability
  • PowerPAD™ HSOP Package

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Parametrics Compare all products in Powered Device

PD Power Level
Fault Response
PoE Current Limit (Min) (mA)
rDS(on) per FET (Typ) (mOhms)
Error Amplifier
PoE Inrush Limit (Typ) (mA)
PoE Standards Supported
Approx. Price (US$)
TPS2379 TPS2378
Auto Retry     Auto Retry    
802.3at type 1/ type 2     802.3at type 1/ type 2    
850     850    
420     420    
No     No    
140     140    
802.3at Type 1 (802.3af)
802.3at Type 2
Non Standard    
802.3at Type 1 (802.3af)
802.3at Type 2    
8SO PowerPAD     8SO PowerPAD    
1.00 | 1ku     0.65 | 1ku